Introduce an Admin::EventScheduleController

- move SchedulesController#update action
- split it into an #create/#update and #destroy action and use these actions in the JS code

app/views/admin/schedule/_day_tab.html.haml

@@ -17,4 +17,5 @@
             = time
           - event_schedules = room_date_event_schedules.select{ |e| (e.start_time.hour.to_s + e.start_time.strftime(':%M')).eql? time }
           - if event_schedules.any?
-            = render partial: 'event', locals: { event: event_schedules.first.event }
+            - event_schedule = event_schedules.first
+            = render partial: 'event', locals: { event: event_schedule.event, event_schedule_id: event_schedule.id}

app/views/admin/schedule/_event.html.haml

@@ -7,7 +7,8 @@
 .schedule-event{ style: "height: #{height}px;  background-color: #{color}; color: #{contrast_color(color)}", |
                  id: "event-#{event.guid}", |
                  guid: event.guid, |
-                 length: cells_length }
+                 length: cells_length, |
+                 event_schedule_id: event_schedule_id }
   .schedule-event-text{ style: "-webkit-line-clamp: #{lines}; height: #{lines * 23}px;"}
     %span.schedule-event-delete-button{ onclick: "Schedule.remove(\'event-#{event.guid}\');" } X
     = event.title

app/views/admin/schedule/show.html.haml

@@ -18,7 +18,7 @@
       Unscheduled events
     .unscheduled-events
       - @unscheduled_events.each do |e|
-        = render partial: 'event', locals: { event: e }
+        = render partial: 'event', locals: { event: e, event_schedule_id: nil }
   .col-md-10
     %ul.nav.nav-tabs
       - @dates.each do |date|